Either B and D I believe I may be wrong..
Answer:
A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons.
Explanation:
An element is a substance that is made entirely from one type of atom. ... A compound is a substance made from two or more different elements that have been chemically joined.
Answer is a. neolithic where they use wild and domesticated crops and domesticated animals
